/*
 * Copyright 2015-2021 the original author or authors.
 *
 * All rights reserved. This program and the accompanying materials are
 * made available under the terms of the Eclipse Public License v2.0 which
 * accompanies this distribution and is available at
 *
 * https://www.eclipse.org/legal/epl-v20.html
 */

package org.junit.platform.engine.support.hierarchical;

import java.util.function.Function;

import org.junit.platform.engine.EngineDiscoveryRequest;
import org.junit.platform.engine.ExecutionRequest;
import org.junit.platform.engine.TestDescriptor;
import org.junit.platform.engine.TestSource;
import org.junit.platform.engine.UniqueId;

/**
 * @since 1.0
 */
public final class DemoHierarchicalTestEngine extends HierarchicalTestEngine<DemoEngineExecutionContext> {

	private final String engineId;
	private final DemoHierarchicalEngineDescriptor engineDescriptor;

	public DemoHierarchicalTestEngine() {
		this("dummy");
	}

	public DemoHierarchicalTestEngine(String engineId) {
		this.engineId = engineId;
		this.engineDescriptor = new DemoHierarchicalEngineDescriptor(UniqueId.forEngine(getId()));
	}

	@Override
	public String getId() {
		return engineId;
	}

	public DemoHierarchicalEngineDescriptor getEngineDescriptor() {
		return engineDescriptor;
	}

	public DemoHierarchicalTestDescriptor addTest(String uniqueName, Runnable executeBlock) {
		return addTest(uniqueName, uniqueName, executeBlock);
	}

	public DemoHierarchicalTestDescriptor addTest(String uniqueName, String displayName, Runnable executeBlock) {
		return addChild(uniqueName, uniqueId -> new DemoHierarchicalTestDescriptor(uniqueId, displayName, executeBlock),
			"test");
	}

	public DemoHierarchicalContainerDescriptor addContainer(String uniqueName, String displayName, TestSource source) {
		return addContainer(uniqueName, displayName, source, null);
	}

	public DemoHierarchicalContainerDescriptor addContainer(String uniqueName, Runnable beforeBlock) {
		return addContainer(uniqueName, uniqueName, null, beforeBlock);
	}

	public DemoHierarchicalContainerDescriptor addContainer(String uniqueName, String displayName, TestSource source,
			Runnable beforeBlock) {

		return addChild(uniqueName,
			uniqueId -> new DemoHierarchicalContainerDescriptor(uniqueId, displayName, source, beforeBlock),
			"container");
	}

	public <T extends TestDescriptor & Node<DemoEngineExecutionContext>> T addChild(String uniqueName,
			Function<UniqueId, T> creator, String segmentType) {
		var uniqueId = engineDescriptor.getUniqueId().append(segmentType, uniqueName);
		var child = creator.apply(uniqueId);
		engineDescriptor.addChild(child);
		return child;
	}

	@Override
	public TestDescriptor discover(EngineDiscoveryRequest discoveryRequest, UniqueId uniqueId) {
		return engineDescriptor;
	}

	@Override
	protected DemoEngineExecutionContext createExecutionContext(ExecutionRequest request) {
		return new DemoEngineExecutionContext();
	}

}
